2阶段降到0.116%/min，第3阶段为0.039%/min。In order to improve solar drying efficiency, forage drying characteristics using low temperature were studied. In the condition of low temperature, lucerne was dried using a dryness test-bed. Through testing and analysis, changes in lucerne moisture content, weight, and surface temperature during the course of lucerne drying were determined. The results showed that the surface temperature of heating during the first stage of drying had the fastest decline to 0.43%/min water content. When the surface temperature was moderate, water drop speed gradually slowed to 0.116%/min; and the water content decline in the third stage was 0.039%/min.